Electrode or grid for storage batteries



Sept. 30. 1924. 1,509,992

J. M. ALLEN ELECTRODE OR GRID FOR STORAGE BATTERIES Filed Oct. e. 1920 Patented Sept. 30, 1924.

UNITED STATES PATENT OFFICE.

JAMES M. ALLEN, O'F ST. LOUIS, MISSOURI, ASSIGNOR TO JAMES M. ALLEN, FRED P.

SMITH, AND FREDERICK D. TUCKER, AS TRUSTEES FOR THE SMITH-.ALLEN BAT- TERY COMPANY, OF ST. LOUIS, MISSOURI.

ELECTRODE OR GRID 'FOR STORAGE BATTERIES.

Application filed October 6, 1920.

To all 'whom t may concer/n.'

Be it known that I, JAMEs M. ALLEN, a citizen of the United States, and resident of the city of St. Louis and State of Missouri, have invented certain new and useful improvements in Electrodes or Grids tor Storage Batteries, ot which the following is a specification containing a t'ull, clear, and enact description, references being had to accompanying drawings, forming a part thereof.

My invention relates to improvements in electrodes or grids for storage batteries and has tor its primary obj ect anelectrode which is stamped and bent ont of a single piece et' material so that itwill be closed on three edges, open on the top and both sides pro-- vided with a grill. j

it further object is to construct an electrode ior secondary batteries ont oit a single sheet ot material in which the ribs forming the grid are made concave-convex, thus still ening the grid and allowing thin material to he used.

ln the drawings:

AlFig. l is a side elevation of my device.

Fig. 2 a horizontal cross section taken on the line 2-2 ot Fig. 1.

Fig. 3 a vertical cross section taken on the line 3 3 oi' Fig. 1, and showing a portion of the active material in position therein.

Fig. d is a plan oi the electrode as it appears when stamped out.

Fig. 5 an elevation of one ot the rivets iliade use ot to secure the centralportion ot 'the electrode.

In the construction ot my device l emplov a sheet ot metal, which is stamped to form the grids 6 and 7. These grids are provided with horizontal bars 8, vertical bars 9 and a irame composed ot members 10, 11, 12 and 13. 'Formed integral with the members 13 are upwardly projectinglugs 14. These lugs acting as binding posts and are adapted to be secured in the crows toot. lllhen stamping my device I provide the flanges 15 and 16 which extend along the edges of the i'rame members 10 and 12, while the trame members 11 are connected together by the portion 17, which acts as the bottom of the electrode. During the stamping operation, the bars 8 and 9 are dished or made concavo- Serial No. 415,020.

convex. The flanges 15 are then bent at right angles to the frame walls and 12 along the lines 1S, while the flanges 16 are similarly bent along the lines 19. The members 6 and 7 are bent at right angles to the bottom 17 along the lines 20. This will shape the grid as illustrated in Figs. l and 2, the flanges lying on the outside of the iianges 16. lWhen this is ycompleted a hot soldering iron is run along the edges of the flanges 15 and the tace ot the side 7. This unites the grid into one solid or integral mass. rilhe projections 14 are bent inwardly along the lines 21 and assume the position shown in Fig. 3, and while being secured in the crows toot the heat ot welding them therein will unite these two members so to form a solid terminal or binding post. The same result can also be accomplished by running a heated soldering iron along the edges oit' the two projections ln order to prevent the spreading or collapsing of the central portion ol3 the grid l malte use of the rivets 22. These rivets are clearly illustrated in Fig. 5 and have their reduced portions 26 inserted through openings 27 formed in one oi the vertical bars 9. After the electrode has been thus assembled the active ma terial 27 is placed in position and pressed securely within the grid, as will be seen in Fig. 3. This allows a large amount ot the active material to be exposed to the action ot the electrode, while the ycurvature ot the bars 8 and 9 securely anchors the active mae terial within the grid and prevents any shitting or dislodgement thereof.

Having described my invention, what l claim is:

An electrode for storage batteries formed oif a single folded sheeto't metal, said sheet when folded having two spaced apart sides, a bottom, and two vertical edges, said ver tical edges composed ot a double thickness 'ot material, concave-convex bars arranged vertically and horizontally 'formed integrally with said sides, said bars having` their conver: sides facing outwardly and upwardly projecting lugs iormed integral with said sides.

ln testimony whereof, I have signed my name to this specification.

JAMES M. ALLEN. 

